Walmart is carrying a prestone line of fuel additives right now that contain poly ether amine too,so it's not just techron or regane anymore.

Next time you're at Canadian Tire, check the labeling on the Formula 1 fuel system cleaners. The latest one has PEA in it, too.

Any idea what percentage of PEA it has?

According to Q&A on CanadianTire's site for product "MotoMaster F1 Ultra Fuel System Treatment, 350 mLit's" the PEA is 10-30% per the MSDS. I couldn't find the MSDS, but it might be there somewhere. CanadianTire's site is a pain to navigate.